500 Best Applied Mechanics MCQ
Q89). Two particles have been projected at angles 64° and 45° to the horizontal. If the velocity of projection of first is 10 m/sec, the velocity of projection of the other for equal horizontal ranges is
a).9.3 m/sec
b).8.3 m/sec
c).7.3 m/sec
d).6.3 m/sec.
Correct Answer:
9.3 m/sec
Explanation:
Q90). μ is coefficient of friction. A wheeled vehicle travelling on a circular level track will slip and overturn simultaneously if the ratio of its wheel distance to the height of its centroid, is
a).μ
b).2μ
c).3μ
d).0.5μ.
Correct Answer:
2μ
Explanation:
Q91). The necessary condition of equilibrium of a body, is :
a).algebraic sum of horizontal components of all the forces must be zero
b).algebraic sum of vertical components of all the forces must be zero
c).algebraic sum of the moments of the forces about a point must be zero
d).all (a), (b) and (c).
Correct Answer:
all (a), (b) and (c).
Explanation:
Q92). A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two poles 20 m apart. If the horizontal tension is 1000 kg, the central dip of the cable is
a).2 cm
b).3 cm
c).4 cm
d).5 cm.
Correct Answer:
5 cm.
Explanation:
Q93). Principle of Transmissibility of Forces states that, when a force acts upon a body, its effect is
a).maximum if it acts at the centre of gravity of the body
b).different at different points on its line of
c).same at every point on its line of action
d).minimum if it acts at the C.G. of the body
Correct Answer:
same at every point on its line of action
Explanation:
Q94). A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is
a).0.33
b).0.44
c).0.57
d).0.67
Correct Answer:
0.67
Explanation:
Q95). If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be
a).20 rad/sec
b).15 rad/sec
c).10 rad/sec
d).5 rad/sec.
Correct Answer:
5 rad/sec.
Explanation:
Q96). A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
a).0.25
b).0.5
c).0.75
d).1
Correct Answer:
0.5
Explanation: